Add appendix for branes at angles

Signed-off-by: Riccardo Finotello <riccardo.finotello@gmail.com>

sciencestuff.sty

@@ -182,32 +182,58 @@
 
 %---- frak letters
 
-\providecommand{\fA}{\ensuremath{\mathfrak{A}}\xspace}
-\providecommand{\fB}{\ensuremath{\mathfrak{B}}\xspace}
-\providecommand{\fC}{\ensuremath{\mathfrak{C}}\xspace}
-\providecommand{\fD}{\ensuremath{\mathfrak{D}}\xspace}
-\providecommand{\fE}{\ensuremath{\mathfrak{E}}\xspace}
-\providecommand{\fF}{\ensuremath{\mathfrak{F}}\xspace}
-\providecommand{\fG}{\ensuremath{\mathfrak{G}}\xspace}
-\providecommand{\fH}{\ensuremath{\mathfrak{H}}\xspace}
-\providecommand{\fI}{\ensuremath{\mathfrak{I}}\xspace}
-\providecommand{\fJ}{\ensuremath{\mathfrak{J}}\xspace}
-\providecommand{\fK}{\ensuremath{\mathfrak{K}}\xspace}
-\providecommand{\fL}{\ensuremath{\mathfrak{L}}\xspace}
-\providecommand{\fM}{\ensuremath{\mathfrak{M}}\xspace}
-\providecommand{\fN}{\ensuremath{\mathfrak{N}}\xspace}
-\providecommand{\fO}{\ensuremath{\mathfrak{O}}\xspace}
-\providecommand{\fP}{\ensuremath{\mathfrak{P}}\xspace}
-\providecommand{\fQ}{\ensuremath{\mathfrak{Q}}\xspace}
-\providecommand{\fR}{\ensuremath{\mathfrak{R}}\xspace}
-\providecommand{\fS}{\ensuremath{\mathfrak{S}}\xspace}
-\providecommand{\fT}{\ensuremath{\mathfrak{T}}\xspace}
-\providecommand{\fU}{\ensuremath{\mathfrak{U}}\xspace}
-\providecommand{\fV}{\ensuremath{\mathfrak{V}}\xspace}
-\providecommand{\fW}{\ensuremath{\mathfrak{W}}\xspace}
-\providecommand{\fX}{\ensuremath{\mathfrak{X}}\xspace}
-\providecommand{\fY}{\ensuremath{\mathfrak{Y}}\xspace}
-\providecommand{\fZ}{\ensuremath{\mathfrak{Z}}\xspace}
+\providecommand{\ffa}{\ensuremath{\mathfrak{a}}\xspace}
+\providecommand{\ffb}{\ensuremath{\mathfrak{b}}\xspace}
+\providecommand{\ffc}{\ensuremath{\mathfrak{c}}\xspace}
+\providecommand{\ffd}{\ensuremath{\mathfrak{d}}\xspace}
+\providecommand{\ffe}{\ensuremath{\mathfrak{e}}\xspace}
+\providecommand{\fff}{\ensuremath{\mathfrak{f}}\xspace}
+\providecommand{\ffg}{\ensuremath{\mathfrak{g}}\xspace}
+\providecommand{\ffh}{\ensuremath{\mathfrak{h}}\xspace}
+\providecommand{\ffi}{\ensuremath{\mathfrak{i}}\xspace}
+\providecommand{\ffj}{\ensuremath{\mathfrak{j}}\xspace}
+\providecommand{\ffk}{\ensuremath{\mathfrak{k}}\xspace}
+\providecommand{\ffl}{\ensuremath{\mathfrak{l}}\xspace}
+\providecommand{\ffm}{\ensuremath{\mathfrak{m}}\xspace}
+\providecommand{\ffn}{\ensuremath{\mathfrak{n}}\xspace}
+\providecommand{\ffo}{\ensuremath{\mathfrak{o}}\xspace}
+\providecommand{\ffp}{\ensuremath{\mathfrak{p}}\xspace}
+\providecommand{\ffq}{\ensuremath{\mathfrak{q}}\xspace}
+\providecommand{\ffr}{\ensuremath{\mathfrak{r}}\xspace}
+\providecommand{\ffs}{\ensuremath{\mathfrak{s}}\xspace}
+\providecommand{\fft}{\ensuremath{\mathfrak{t}}\xspace}
+\providecommand{\ffu}{\ensuremath{\mathfrak{u}}\xspace}
+\providecommand{\ffv}{\ensuremath{\mathfrak{v}}\xspace}
+\providecommand{\ffw}{\ensuremath{\mathfrak{w}}\xspace}
+\providecommand{\ffx}{\ensuremath{\mathfrak{x}}\xspace}
+\providecommand{\ffy}{\ensuremath{\mathfrak{y}}\xspace}
+\providecommand{\ffz}{\ensuremath{\mathfrak{z}}\xspace}
+\providecommand{\ffA}{\ensuremath{\mathfrak{A}}\xspace}
+\providecommand{\ffB}{\ensuremath{\mathfrak{B}}\xspace}
+\providecommand{\ffC}{\ensuremath{\mathfrak{C}}\xspace}
+\providecommand{\ffD}{\ensuremath{\mathfrak{D}}\xspace}
+\providecommand{\ffE}{\ensuremath{\mathfrak{E}}\xspace}
+\providecommand{\ffF}{\ensuremath{\mathfrak{F}}\xspace}
+\providecommand{\ffG}{\ensuremath{\mathfrak{G}}\xspace}
+\providecommand{\ffH}{\ensuremath{\mathfrak{H}}\xspace}
+\providecommand{\ffI}{\ensuremath{\mathfrak{I}}\xspace}
+\providecommand{\ffJ}{\ensuremath{\mathfrak{J}}\xspace}
+\providecommand{\ffK}{\ensuremath{\mathfrak{K}}\xspace}
+\providecommand{\ffL}{\ensuremath{\mathfrak{L}}\xspace}
+\providecommand{\ffM}{\ensuremath{\mathfrak{M}}\xspace}
+\providecommand{\ffN}{\ensuremath{\mathfrak{N}}\xspace}
+\providecommand{\ffO}{\ensuremath{\mathfrak{O}}\xspace}
+\providecommand{\ffP}{\ensuremath{\mathfrak{P}}\xspace}
+\providecommand{\ffQ}{\ensuremath{\mathfrak{Q}}\xspace}
+\providecommand{\ffR}{\ensuremath{\mathfrak{R}}\xspace}
+\providecommand{\ffS}{\ensuremath{\mathfrak{S}}\xspace}
+\providecommand{\ffT}{\ensuremath{\mathfrak{T}}\xspace}
+\providecommand{\ffU}{\ensuremath{\mathfrak{U}}\xspace}
+\providecommand{\ffV}{\ensuremath{\mathfrak{V}}\xspace}
+\providecommand{\ffW}{\ensuremath{\mathfrak{W}}\xspace}
+\providecommand{\ffX}{\ensuremath{\mathfrak{X}}\xspace}
+\providecommand{\ffY}{\ensuremath{\mathfrak{Y}}\xspace}
+\providecommand{\ffZ}{\ensuremath{\mathfrak{Z}}\xspace}
 
 %---- groups